Fei Zhong had become a top-tier elite one class below divinity, so he was able to see through the heavenly secrets and understand the truths of the world. He was intimidated only because of Yan Yu's great fame.
When Gong Nanfeng exposed Yan Yu's fake identity, Fei Zhong was naturally fuming with anger.
He was a grand authority in the Dwarves and regarded as a "deity-like figure". However, he had been played by a few Supreme Saints in the Hundred-Shackle and Thousand-Koan Realm. They destroyed the puppet clone that he had painstakingly cultivated. That was a great humiliation to him.
It is known that Fei Zhong's cultivation, strength, and status in the Celestial Court were far superior even compared to the likes of Wu Zu from Guanghan and Emperor Ji Mie.
Fei Zhong shouted angrily, "Who are you?"
"I am Yan Yu, the god of Demigods." Zhang Ruochen waved Gong Nanfeng away and tried to pretend still.